fast mini engine build advice needed

[miniman1480]

its been a while since i was last on here
but anyway the time has come i want a faster engine as the 1000 just dosnt cut it.
i have just got hold of a complete 1275 engine and i am wishing to use as a base but i have some parts of and old engine i can use these include a race head with double valve springs ets 37mm inlet valves and 30mm exaust valves i also have a set of cooper s rods and a 88mm crank and a AEG530 cam duplex timming gear etc would all these bits make a good enigne? power etc? and wot cc is best to go for with this crank etc any advice greatly appriciated

thanks john

[Tangent Police]

Put the 88mm crank on ebay. Buy BMW 16v bike head.....

Done.

[miniman1480]

wish i had that much money and insurance might kill me!

[miniman1480]

cranks 84mm when i measured it which is offset gound to fit coopers rods